The best loot ceiling in the game, but it's a group endgame target: a Bradley APC patrols the grounds, scientists roam, the radiation is brutal, and it's the biggest PvP magnet on the map. A solo doing the puzzle alone is high-risk for the reward.
| Keycards | Green Red |
| Fuses | 2 electric fuses (needed at once) — looted only, bring a spare |
| Radiation | High. The exterior switches need ~25 protection; the main Vehicle Assembly Building is one of the two worst rad zones in the game — bring a full hazmat AND a water jerry can or rad pills. |
Go to the green building labelled "011" and flip the switch inside.
Head past the rocket to the stone building with the metal ramp; down the stairs, flip the switch in the room on your left.
(Optional parkour cache) Go to the scaffolding, drop down the hole, jump to the ledge, activate the timer, cross the beams, and hit the red button for a loot cache (2 elite + 2 military + 2 normal); the other button gets you out.
At the little building by the 3 silos, swipe your Green card, place fuse #1 in the box, and flip the switch.
On the far side near the two blue containers, place fuse #2 in that box and flip its switch.
Enter the large main building through the Red door on the right.
Climb to the roof (mind the rickety stairs) and take the loot.
To exit, flip the switch in the Auxiliary Power room and use your Red card again on the way out.
📷 Screenshots coming for these spots:
Keycard-door loot respawns every 30 minutes — far faster than open crates, so a puzzle you can reach is renewable income.
One down — here's the rest of the ladder.